After the prosperous Tang Dynasty

Xiao Yansui and Xiao Song walked all the way to the courtyard that needed to be rebuilt.

At this time, bricks, sand, and cement piled up in the courtyard, making it a mess.Because Xiao Yansui put forward many special requirements during the renovation process, those skilled craftsmen also slowed down a little when they were working these days, and they had to ask Xiao Yansui one by one before they could Make up your mind whether to follow the convention or make corresponding changes according to the meaning of the owner.

Xiao Song looked at the chaotic scene in the courtyard with great interest, avoided the place where the craftsmen were working, stood not far away, and walked around slowly. After seeing everything, he said curiously: " I see that the main body of this house is mostly made of bricks?"

After thinking about it, Xiao Song asked uncertainly based on his own understanding: "For pure masonry, the ground may seep water during the rainy season."

"Don't worry, Ah Weng, who put the isolation layer." Xiao Yansui followed Xiao Song and said with a smile.

And to put it bluntly, in fact, the phenomenon of ground dampness in masonry-structure houses is basically not caused by water seepage, but by the fact that the ground temperature is lower than the air.

Especially when the humidity in the air increases, due to the beginning of spring, the temperature rise of the walls and floors inside the house is slower than that outside the house. In addition, there is sometimes a lack of direct sunlight inside the house, so that the humid wind blows in and water vapor condenses. On the ground and walls, when it is exaggerated, it can even form a flowing water layer, which will not dry for a long time.

There are two ways to solve this problem. One is to reduce the air humidity—this is a characteristic of the climate in the south of the Yangtze River. It is a purely natural factor and cannot be changed. The other is to keep the indoor floor and wall temperature as low as possible. Because the winter of the previous year dropped sharply, it will not slow down until the spring of the next year.

To put it bluntly, install underfloor heating under the floor, add a green layer to the walls, keep the indoor temperature in winter, and then let the windows be transparent and sunny. When the next spring begins, most of the indoor damp phenomenon will be solved.

Xiao Song looked at the design of the insulation layer curiously, and suddenly remembered the down jacket that Xiao Yansui gave her brother when Xiao Heng took the imperial examination.

At the time of the Tang Dynasty, most people had the impression that there was a default way of thinking, the thicker the thicker the warmer.However, looking back at the things Xiao Yansui made, whether it was clothes or walls, it seemed that they deliberately left a space in the middle, and then filled it with extra fluffy things.

Xiao Song considered his words and told his granddaughter about his discovery.

Without even thinking about it, Xiao Yansui replied directly: "Because air is a poor conductor of heat."

In fact, not only down jackets and wall insulation, but also common daily necessities such as thermos cups, are all practical applications of this objective law.

After hearing this, Xiao Song was confused for a while, and blinked his eyes slightly. He would inevitably feel a little strange about his granddaughter's explanation, but if it was related to reality, he could probably think of something. Wu Wu nodded, and then said: "Furs are expensive, and ordinary people may not be able to afford them. However, if the poultry wings and feathers kept at home can be used as winter clothing, I think that when winter comes, the lives of the people all over the world will also be different." Can be better."

"..." After hearing this, Xiao Yansui deliberately thought about it carefully, and then said with uncertainty: "Maybe?"

After all, she is not in the business of clothing. For warm clothes like down jackets, she typically knows the basic principles, knows that there are differences in the sources of down jackets among good down jackets, and that the actual materials used are actually the feathers of birds. The small tuft of soft down in the middle, and because of the exquisite craftsmanship of the embroiderers who made the clothes, and the fact that they didn't consider the cost at all, Xiao Heng's down jacket has an outstanding thermal effect.

However, if it were ordinary people, Xiao Yansui wasn't sure, if he pulled out any feathers and stuffed them inside his clothes, he would definitely be able to keep warm...

Xiao Song didn't care about the uncertain expression on Xiao Yansui's face.

Although he was also born in a wealthy family, but as he is older, he has naturally rich experience. Xiao Song knows in his heart that those ordinary people actually have their own way of survival. In fact, the little girl is innocent and ignorant of the world in another sense.

Many things, those ordinary people have never been exposed to it, so naturally they have never tried it.Just like the people in the northwest border area, and the people in the affluent places in the south of the Yangtze River, whether it is folk customs or daily habits, they are very different. It is nothing more than the difference in the way of survival that has been handed down for a long time.

Looking back, if these clothes made of poultry down and feathers are really better for keeping out the cold in winter, when the winter comes, let the servants and tenants in the village wear them casually, and walk around among relatives, friends and neighbors, and they will naturally spread slowly. On the contrary, if there is anything inappropriate about these clothes, there will naturally be quick-witted common people to find ways to improve and solve them.

On the contrary, Xiao Song, he has plenty of charcoal fires in winter, the house is not frozen, and the second is that he never has to go to the fields to do hard farm work, which really makes him think about everything for ordinary people. The difference in living environment, on the contrary, is doomed to be one an impossible thing.

Leaving aside the topic of keeping warm in winter, floor heating and other things are planned to be laid on the ground after the embryo of the house is completed. Naturally, Xiao Song can't see it right now. His eyes soon fell on The window position is much larger than other houses.

However, Xiao Song didn't know that Xiao Yansui had already started to think about making glass by himself, and also planned to install windows for him, so he didn't think too much about it, only thinking that his granddaughter liked bigger windows and a better view from the windows. It is so vast that you can see every corner of the courtyard at a glance.

As for the cement that has already been put into use, it is the most important thing for Xiao Song and his party today!

He watched some craftsmen holding something similar to a small flat shovel, skillfully smoothing the cement on the wall. The cement was still soft at first, and those craftsmen fiddled with it casually on the wall. The frozen state, can't help but be amazed.

"This thing is actually faster than the freezing speed of winter water in Northwest China!" When Xiao Song said this, his words were gentle, but his heart couldn't help being excited. After calming down, he looked up at the cement that had gradually formed on the wall, and said just now: "If we are rushing to build a fortification such as a city wall, cement may be of great use."

"Ah?" Xiao Yansui was stunned for a moment, then subconsciously replied: "This cement is not strong enough!"

In her impression, high-strength cement must be used for building fortifications and road repairs. Otherwise, the impact force is too large, or the load-bearing capacity of the road surface is high, and the cement will be easily damaged. Bad, after all, this thing is said to be strong, but if you want to destroy it, it must still be inferior to the natural mountain structure.

Moreover, the area around the south of the Yangtze River is mostly water towns, and there are rivers flowing between many mansions. As for the small roads in the town, whether they are paved with bluestone slabs in Shanhai Town or cobblestones used in the courtyard for beauty, they all have their own characteristics. A water town sentiment.

To put it bluntly, because there is no need for this at the moment, after Xiao Yansui tinkered with the cement, she naturally didn't think much about road construction. As for fortifications, she had even less contact with them.

Xiao Song, however, slowly picked out a few important words, and asked earnestly, "High-strength cement?"

"It's just to make the cement stronger." Xiao Yansui said, directly picked up a stone, smashed it hard on the dry part of the wall where the cement had already been applied, and then pointed to the small hole above and said: " This kind is not strong enough, it can be used to build a house, but if it is a bridge or road, it is easy to break."

Xiao Song nodded immediately, "Then what about the high-strength cement you mentioned?"

"During calcination, mineral powder, slag, and fly ash can be added appropriately," Xiao Yansui said casually.

Considering that Xiao Song would not be able to understand the "water reducing agent" directly, Xiao Yansui temporarily omitted the second half of the sentence. Anyway, if Xiao Song really wants this kind of cement with relatively high strength, the cement kiln It has to be tested, fired repeatedly, and the process flow has to be changed accordingly.

Only then did Xiao Song nod his head, but to Xiao Yansui's surprise, after his grandfather asked, he didn't bluntly ask the craftsmen at the cement kiln to produce the cement he wanted. He looked thoughtful, but he didn't know what he was thinking about.

After seeing the construction site, Xiao Song went back feeling quite satisfied, and Xiao Yansui accompanied him all the way. Afterwards, he left Xiao Song again and went back to his own yard.

These days have passed, and the embarrassing period of the beagle's growth has passed. Now, among the four dogs kept in Xiao Yansui's yard, as the youngest, it gradually shows the vigorous figure of the beagle, tall and leggy. Long, smooth lines, sharp and bright eyes.

Moreover, after a period of running-in, the beagle and the other three aborigines finally lost their hostility and started playing with each other.

It's just that the beagle's natural physical fitness is relatively good, and the instinct that has been deliberately cultivated since childhood is more outstanding, so that during this period of time, the beagle is often in a state of hunting in a wild way, and the other three aborigines There are also some who imitate, but end up being so tired that they lie on the ground and stick out their tongues.

As soon as Xiao Yansui entered the yard, she saw her three aboriginal dogs lying on the side of the nest, sticking out their tongues and staring at the beagle without blinking. As for the beagle, it was playing like crazy Same, it hasn't stopped yet.

Xiao Yansui: "..."

That is to say, the instinct of the beagle is to hunt, and the yard here is big enough for it to run. Otherwise, she felt that what she saw should be the tragedy of the house demolition of huskies and Alaska...